Pump with deformable diaphragm



Dec. 8, 1931. c. R. wAsElGE PMP WITH DEFORMABLE DIAPHRAGM Filed April24, 192s 3 sheets-sheet 1 Figi Dec. 8, 1931. C. RAWAs-ElGE LSB-5,919

PUMP WITH DEFORMABL DIAPHRAGM Filed April 24, 1928 3 Sheets-Sheet 2 IWWl//l//l/ lll/l o: c? P0 FE m N Y l CRn/Sge Dec. 8, 1931. c. R. wAsElGE1,835,919

PUMP WITH DEFORMABLE DIAPHRAGM Filed April 24, 1928 3 Sheets-Sheet 3Patented Dec. 8, 1931 UNITED STATES NP xrlsla'r OFFICE CHARLES RAYMONDWASEIGE, F RUEIL, FRANCE, ASSIGNOR T0 HENRI ET MAURICE FARMAN, 0FBILLANCOURT, SEINE, FRANCE PUMP WITH DIEIFORMABLE IDIAPHRAGIMIApplication led April 24, 1928, SerialiNo. 272,551, and in France May17, 1927.

The present invention relates to various improvements in pumps of thetype comprising elastic diaphragms and one or more pump bodies, adaptedfor use with petrol, hydrocarbons and other solvents for lubricants, or

for like purposes. The said improvements consists in a betterarrangement of the several parts of the pump, which may comprise one ormore diaphragms. By this improved arrangement, I am enabled to reducethe size and weight of the pump, to Simplify its manufacture and upkeep,and chiefly to directly control it at higher speed than can be employedin the known pumps of this t pc.

yIn this manner, I am enabled to utilize diaphragms having a smalldiameter and a high rate of pulsation, and thus to obtain a large outputwith a small sized apparatus. Furthermore, when the said constructioncomprises several diaphragme, the functioning of the said diaphragmswill be quite independent.

The principal characteristics of the inven tion are set forth in thefollowing description with reference to the appended drawings which aregiven solely by way of example.

Fig. l is a section on the line 1-1 of Fig. 2.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is an external view of the pump, viewed from the driving end.

Fig. 4 is a modified form ofthe pump body,

Vby which the part of the diaphragm opposite the valve boxes is directlyconnected with the atmosphere.

In the construction herein represented, the two pump chambers A and B,provided with their usual boxes, are placed on the respective sides ofthe main body C of the apparatus. The multiple diaphra gms D aredisposed between the main bodv C and the said pump chambers. The saiddiaphragms are held between the discs T T with which they are adapted tomake contact in both directions. The disc T is movable with a very smalldiametrical play, thus forming a piston whereby the efficiency isincreased. The motion of the said diaphragms in the deliverv stroke islimited bv the stop screws E which are secured to the covers providedwith valves, said motion being caused by the action of one or moresprings F, which abut against the respective diaphragms and are d1s osedin the interior of the lianged members which are' guided by therespective pieces H. The motion of the diaphragms in the suction strokeis limited by the stops Y which are secured to the said main body andare disposed at the periphery.

This motion in either direction is effected by the rocking members Iwhich are pivotally mounted at O upon the axles K which are secured tothe main body and are provided with forked brackets L coacting-by meansof the rollers M-with the flanges G-G.

The arm N of the said rocking members car-v ries a roller P adapted toroll upon the cam R.` Each of the said rocking members is4 actuated by aseparate cam, mounted on the cam shaft S which is rotatable in suitablerings mounted on the main body of the apparatus, and is provided on oneside with an actuating pinion or other suitable driving means Z.

When the roller of the said rocking memthe inner circle of the cam, thediaphragm will be driven into the delivery position by the action of thesprings. Since the two cams occupy a like position with reference to theshaft, the roller of the second rocking member will now makecontact/with the outer circle of the second cam; the correspondingdiaphragm is in the withdrawing position, and the springs are caused tobear upon said cam, through the medium of the member G and the saidrocking device.

The alternate motion of said diaphragme is eiected by the rotation ofthe cam shaft, actuated by said rocking members whose position issymmetrical with reference to the said shaft, as indicated in Fig. 1;.one diaphragm is in the discharge position, and the other diaphragm isconcurrently in the suction position. In this manner the spring issubjected solely to an alternate motion, without any marked compressionof the coils.

I am ythus enabled to obtain..-the proper proportion between the momentof the delivery and the moment of the suction, by a ber, on the sidenext the cam, is situated on suitable choice of the outline of the cams.It is a known fact that in the case of diaphragm pumps operating upon ahigh frequency of pulsations, the suction period should be the maximum,and that an inactive period must be allowed between the suction effectand the delivery effect, in order that the valves may drop freely.

The self-regulat-ion is automatic, as will be observed by an examinationof Fig. l. When the delivery tends to diminish due to a stoppage of theconduit, for inst-ance when a cock is closed on either or both of thepumps, since the liquid is practically incompressible the saiddiaphragme will move at the same time towards the interior of the mainbody of the apparatus. The diaphragms thus compress the springs, and thesaid rocking devices cease to act on the flanged members, so thatthe camshaft rotates without load. When only one of the pumps has its deliverychecked, the corresponding diaphragm compresses the spring until theextreme suction position is att-ained, this position being determined bythe contact between the washer of the diaphragm T and the stops Ymounted on the main body of the apparatus. The said stops are placed insuch manner that when in this extreme position of the said diaphragm acertain play will be a1- lowe'd between the roller of the said rockingdevice and the outer periphery of the cam.

The said apparatus can be lubricated on the splashing system.

Should one of the said diaphragms be broken, gasoline might thus enterthe general mechanism, which would offer prejudice to the proper oilingof the cams and the coacting rocking devices, and to this end I providean ofl'take pipe V, of Siphon shape, whereby the gasoline is led to theexterior. The said diaphragm (thus free from all defective action canherein operate for a certain length -of tlme, and without breakdowns ofan immediate nature.

In the case in which the pump comprises a single diaphragm, the saidreaction spring abuts upon the main body of the apparat-us or upon acover.

Each pump is preferably provided with a iilter through which thegasoline is circulated from the exterior to the interior, and in thismanner the wire gauze can be readily cleaned.

In the modified form of construction Which is shown in Fig. 4, thechamber Q is disposed between each of the said diaphragms and the mainbody of the apparatus; said chamber is provided with an atmosphericoutlet. In this manner the motion of the said diaphragm in the casing ofthe apparatus will not produce a pressure, or

an excess of pressure, whereby the pressure of the pump delivery will bemade irregular.

Furthermore, in this modified construction, should one of the saiddiaphragms be broken, ,the gasoline will be at once discharged to theexterior, without any appreliension that it will be mixedwith thelubricating oil. shown in Fig. 4. The atmospheric connection is effectedby the pipe W, by which any leakage of gasoline wi-llbe led directlyinto the interior of the aeroplane body.

kmembers, means for positively actuating said pumping members in thesuction strokes, said means comprising a cam-shaft, two cams ofidentical outline and angular disposition on said cam-shaft, twoparallel rocking members, one end of one rocking member being adapted toengage one cam on one side of said cam-shaft, the'oorresponding end ofthe other rocking member being adapted to engage the other cam on theopposite side of said cam-shaft, the other ends of said rocking memberscooperating with said pumping members respectively, whereby said pumpingmembers and said spring are normally moved as a whole by said rockingmembers and said pumping members may assume relative displacementsagainst the force of said spring, means for supplying liquid to saidcasing and means for discharging liquid from said casing.

In testimony whereof I have signed my name to this specification.

CHARLES RAYMOND WASEIGE.

This modified construction is.

